Lay your cards on the table 摊牌
A 'flush' in poker is when you have five cards in a row of the same suit (clubs, spades, diamonds or hearts). The cards in the picture are a special kind of flush called a 'royal flush', which includes the ace card. It is the highest hand in many forms of poker.
扑克里的同花牌指的是5张同样花色的连牌 （梅花，黑桃，方块或红心）。图片里的5张花色相同的连牌是 royal flush 同花大顺，因为连牌里有张尖儿。在很多扑克游戏里，同花大顺算是最大的一手牌了。
短语 lay (or put) your cards on the table 的意思是摊牌，也就是开诚布公地把自己的思想、感情和意图说出来。
I think it's time to lay your cards on the table. Tell me honestly why you don't like my new boyfriend.
Sue laid her cards on the table and told her lecturer she was going to change her undergraduate degree.
短语 to keep (or play) your cards close to your chest 的意思和上面讲的短语的意思完全相反。To keep (or play) your cards close to your chest 的意思是不露声色，守口如瓶，秘而不宣。
Brian always keeps his cards close to his chest when it comes to his investments.